third_party/llvm-7.0/llvm/test/CodeGen/X86/machine-sink-and-implicit-null-checks.ll

; RUN: llc -mtriple=x86_64-apple-macosx -O3 -enable-implicit-null-checks -o - < %s 2>&1 | FileCheck %s

declare void @throw0()
declare void @throw1()

define i1 @f(i8* %p0, i8* %p1) {
 entry:
  %c0 = icmp eq i8* %p0, null
  br i1 %c0, label %throw0, label %continue0, !make.implicit !0

 continue0:
  %v0 = load i8, i8* %p0
  %c1 = icmp eq i8* %p1, null
  br i1 %c1, label %throw1, label %continue1, !make.implicit !0

 continue1:
  %v1 = load i8, i8* %p1
  %v = icmp eq i8 %v0, %v1
  ret i1 %v

 throw0:
  call void @throw0()
  unreachable

 throw1:
  call void @throw1()
  unreachable
}

declare void @foo()

declare token @llvm.experimental.gc.statepoint.p0f_isVoidf(i64, i32, void ()*, i32, i32, ...)
declare i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token, i32, i32) nounwind readonly

; Check for a crash.  The crash is not specific to statepoints, but
; gc.statpeoint is an easy way to generate a fill instruction in
; %continue0 (which causes the llc crash).
define i1 @g(i8 addrspace(1)* %p0, i8* %p1) gc "statepoint-example" {
 entry:
  %c0 = icmp eq i8 addrspace(1)* %p0, null
  %tok = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* @foo, i32 0, i32 0, i32 0, i32 0, i8 addrspace(1)* %p0)
  %p0.relocated = call coldcc i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token %tok, i32 7, i32 7) ; (%p0, %p0)
  br i1 %c0, label %throw0, label %continue0, !make.implicit !0

 continue0:
  %c1 = icmp eq i8* %p1, null
  br i1 %c1, label %throw1, label %continue1, !make.implicit !0

 continue1:
  %v0 = load i8, i8 addrspace(1)* %p0.relocated
  %v1 = load i8, i8* %p1
  %v = icmp eq i8 %v0, %v1
  ret i1 %v

 throw0:
  call void @throw0()
  unreachable

 throw1:
  call void @throw1()
  unreachable
}

; Check that we have two implicit null checks in @f

; CHECK: __LLVM_FaultMaps:
; CHECK-NEXT:        .byte   1
; CHECK-NEXT:        .byte   0
; CHECK-NEXT:        .short  0
; CHECK-NEXT:        .long   1

; FunctionInfo[0] =

; FunctionAddress =
; CHECK-NEXT:        .quad   _f

; NumFaultingPCs =
; CHECK-NEXT:        .long   2

; Reserved =
; CHECK-NEXT:        .long   0

!0 = !{}